Stimulated Raman scattering in a multipass cell filled with CO2

An experimental investigation was made of stimulated Raman scattering in CO₂ filling a multipass optical cell. An increase in the number of the Stokes and anti-Stokes components of stimulated Raman scattering was observed when the CO₂ pressure was reduced to 0.3–4 atm. Measurements were made of the wavelengths and of the spectral width of the components of stimulated Raman scattering in CO₂ observed for the first time. The dependences of the energies of the Stokes and anti-Stokes components of the scattering in CO₂ on the pump energy (λ ~1.06 μ) were determined using a multipass cell. A reduction in the pressure of CO₂ to 0.5–1 atm resulted in generation of just the axial anti-Stokes components of the scattering.